Lens Mount Index; Tripod Mount; Orientation Locking Knob - Canon EF 400mm f/2.8L IS USM Instructions Manual

10. Using the Tripod Mount
Adjusting the Tripod Mount
By loosening the orientation locking knob on the tripod mount you can rotate the camera to set the
image for any vertical or horizontal position.
Detaching the Tripod Mount
First remove the lens from the camera and then remove the tripod mount from the lens as shown
below. To attach the tripod mount, reverse the procedure.
Loosen the orientation
locking knob.
(EF300mm f/2.8L IS USM only)
Align the red mark on the
tripod mount with the lens
mount index.
Slide off the tripod collar
away from the rear of the
lens.
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